Armature reaction is the of the air gap flux that results from interaction of the magnetic field created by in the armature with uniform magnetic field of the. winding. Armature reaction results in pole tip saturation and a shift in the lies the main field poles at no-load. In generators this shift in the neutral plane is in the direction of The effects of armature reaction can be reduced by equipping the DC machine w connected in series with the or by physa shifting the position of the If this is not done will occur at the brushes and the generator

Armature reaction is the of the air gap flux that results from interaction of the magnetic field created by in the armature with uniform magnetic field of the. winding. Armature reaction results in pole tip saturation and a shift in the lies the main field poles at no-load. In generators this shift in the neutral plane is in the direction of The effects of armature reaction can be reduced by equipping the DC machine w connected in series with the or by physa shifting the position of the If this is not done will occur at the brushes and the generator

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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(a) A 6 pole, 2 circuit, wave-connected armature has 250 conductors and runs at 1200 r.p.m. The electromotive force generated on open-circuit is 600V. Find the useful flux per pole. (b) An 8-pole, lap-connected armature has 960 conductors, a flux of 40mwb per pole, and a speed of 400 rpm. Calculate the e.m.f. generated on open-circuit. (c) If the armature in (b) were wave-connected for 2 circuit, at what speed must it be driven to generate 400V. (d) A 4-pole generator has a flux of 40mwb per pole and a lab-connected armature with 740 conductors. Find the e.m.f. generated on open circuit at 1000 r.p.m.
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The 4-pole direct current electric machine works as a generator. In this direct current machine, which also has auxiliary poles, the direction of the excitation flux is from bottom to top at the remaining pole located at the top of the armature from the main poles on the d axis. As the current direction is ๏ in armature conductors corresponding to the same pole; (show by drawing the figure)a. The direction of flux at the main polesb. Current direction at main polesc. Direction of flux at auxiliary polesD. Direction of current at auxiliary polesto. Direction of rotation
The 4-pole direct current electric machine works as a generator. In this direct current machine, which also has auxiliary poles, the direction of the excitation flux is from bottom to top at the remaining pole located at the top of the armature from the main poles on the d axis. As the current direction is ๏ in armature conductors corresponding to the same pole; (show by drawing the figure)a. The direction of flux at the main polesb. Current direction at main polesc. Direction of flux at auxiliary polesD. Direction of current at auxiliary polese. Direction of rotation
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